Question Good way to "see" a Canvas Group?

I'm not terribly good at UI development but I would like to see each of the elements and some/many have no visual representation. For instance I have a canvas and I add a canvas group. I can set the width/height equal to the canvas and I know it covers the canvas but I can't actually see it.

In that example I actually have an image so that is visible but if I size it differently I can't tell it if it is covering the entire canvas (or even if it is bigger than the canvas). And then I add another canvas group to that one and again I can't tell how much area it covers.

Is there a spiffy way to view a grid, or a rectangular outline or anything to help me visualize how things like this line up?